In a large blender or food processor, combine all ingredients and blend for 1-2 minutes. Set aside.
For serving:
Cook fettuccini according to package directions, usually 10-11 minutes. Drain and return to pot. Pour roasted red pepper sauce over top, and toss until well combined.
Serve pasta in individual serving bowls. Sprinkle with fresh Parmesan and basil leaves, if desired.